650/X-2 750 x2

Location
Ohio
Look for a complete ready to drop in 750 motor with carbs and electronics. You can bolt on the stock 650 exhaust (and it will run like a 650) while you look for an aftermarket pipe. Dual carbs are ok but if you get the stock 38mm 750 carbs with the matching airbox, you will have to grind the airbox a little
Will a 650 coffmans pipe be ok or should i be looking for an aftermarket 750 pipe?
any preference on a big pin or small pin motor?
 

RivMan

doing something stupid...
Site Supporter
Location
Pinckney, MI
Sure there is, it's because the hull a 750 comes out of is different. An aftermarket 650 pipe will be very close in volume to a 750 pipe. I don't think I've EVER heard of someone running a 750 pipe in an X2. They just don't fit.

-Rob
 
Sure there is, it's because the hull a 750 comes out of is different. An aftermarket 650 pipe will be very close in volume to a 750 pipe. I don't think I've EVER heard of someone running a 750 pipe in an X2. They just don't fit.

-Rob

They fit... some pipes require a little modifying for example- my x2 im going to run a factory limited 750 pipe, It doesn't truly fit right now but I am using a 650 westcoast exhaust manifold to angle the pipe so it doesn't touch the hull. I just need to bore my manifold to a 46mm to have the same flow as the factory one.

I guess its all about what your going for... If you just want a 750 with a 650 pipe that you know will fit your going to be at a stock power level but if you go with a nice aftermarket 750 pipe you will have powerful 750. In my opinion if your going to do the conversion you should do it right in the first place or you wont be happy with it in the long run. A 750 with a aftermarket 650 pipe will run no better than a stock 750, and usually the pipe is a huge power gain from stock. I know on factory's web site they say that the limited chamber will gain 21hp on a small pin when they tested it so that would be a huge gain from stock, and i am sure the coffman wouldn't be that big of a gain but probably 15 to 19hp gain I am guessing but its cheaper than the factory.

A lot of people will say that a stock 750 in a x2 will almost perform no better than there modded 650's so that is one reason why I am trying to go all out on my 750 x2. But again it is your option to run what ever pipe you want in your ski. It might also have to do with how your wallet is feeling after buying a 750... lol

wednesday i'm going down to my shop and I will bring home both of my pipes (650 westcoast, 750 limited factory) so I can figure out the different cc's of water that fit in them.
 

Vumad

Super Hero, with a cape!
Location
St. Pete, FL
Will a 650 coffmans pipe be ok or should i be looking for an aftermarket 750 pipe?
any preference on a big pin or small pin motor?

Coffman or Westcoast 650 pipe would be great. The best Setup is a Bored out Westcoast 650 manifold, with a FPP B-pipe head pipe and a FPP Superjet limited chamber, all going to a modified stock or Sj waterbox.
 

Vumad

Super Hero, with a cape!
Location
St. Pete, FL
Sure there is, it's because the hull a 750 comes out of is different. An aftermarket 650 pipe will be very close in volume to a 750 pipe. I don't think I've EVER heard of someone running a 750 pipe in an X2. They just don't fit.

-Rob

I used to have a FPP 750 limited pipe in my X2, but I switched over to the SJ limited chamber. There's someone else who is running a FPP 750 pipe in the X2 and Austin will be another that I know of. i have seen FPP B-pipes with Blaster, SJ limited, SJ mod, 750 Limited and SXR 800 pipes. Also coffman and westcoast 650. There are many options, but all of the require some sort of fancy installation except the AM 650 pipes. Some people simply make a small bubble in the hull to put in larger pipes. Theres someone who put in an 1100 and worked a bubble in the bottom deck to fit the pipe and made a custom set of tubbies to blend in the bubble so it looked just like tubbies.

You can do anything with some glass and epoxy, but there's a large number of options that don't need any cutting of the hull.
 
In my 750 X2 I ran a stock 650 pipe, mariner 650 exhaust, westcoast 650 exhaust, and a coffman 750 exhaust for a short period. The coffman made the best power but I didnt like where that power was made , to high up in the rpm range and it was loud as :):):):). And it was a major pain in the a$$ to install. Superjet pipe, or am 650 pipe will be your best bet. I ran the westcoast 650 exhaust for the majority of the time, easiest to install and made good power. A lot more power than the same setup with a 650 motor as well.

Also, I did what Austin mentioned by measuring the volume of the pipes. The mariner was the largest, then the coffman 750, then the westcoast, but they were all within 5% of each other.
 

RivMan

doing something stupid...
Site Supporter
Location
Pinckney, MI
On my 750 X2 I've run a stock 650 manifold + exhaust, stock 650 manifold + westcoast pipe, westcoast manifold + westcoast pipe, and the westcoast manifold bored out + Coffman pipe.

The only 750 pipes I've seen people run are the FPP pipes, and I'm sure their great, but I've never ridden one.

Bottom line is that a 650 Coffman pipe on my 750 X2 rips. Tons of punch out of the hole and walks an SXR up top.

-Rob
 

Vumad

Super Hero, with a cape!
Location
St. Pete, FL
You certainly cannot tell me that the aftermarket 650 pipes are the same volume as the 750. The FPP 750 limited pipe is massive compared to any AM 650 pipe. The Superjet B-pipes are larger than the 650 pipes. The outlets on the 750 pipe are larger too, 2" compared to 1-3/4". Larger expansion and larger outlet for more flow. I haven't compared different pipes side-by-side back-to-back, but the 750 pipes are most certainly larger.
 

Jp79

Building Brawlers
Location
Harveys Lake,Pa
The blaster chamber is a nice clean fit, tight but works great on the 750. Look at my pics I'm currently running one with the 650 mani.
 
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